Enum rustc_mir::interpret::MemPlaceMeta

pub enum MemPlaceMeta<Tag = ()> {
    Meta(Scalar<Tag>),
    None,
    Poison,
}

Information required for the sound usage of a MemPlace.

Variants

Meta(Scalar<Tag>)

The unsized payload (e.g. length for slices or vtable pointer for trait objects).

None

Sized types or unsized extern type

Poison

The address of this place may not be taken. This protects the MemPlace from coming from a ZST Operand without a backing allocation and being converted to an integer address. This should be impossible, because you can't take the address of an operand, but this is a second protection layer ensuring that we don't mess up.

Implementations

impl<Tag> MemPlaceMeta<Tag>

pub fn unwrap_meta(self) -> Scalar<Tag>

pub(in interpret::place) fn has_meta(
    self
) -> bool

pub fn erase_tag(self) -> MemPlaceMeta<()>

Trait Implementations

impl<Tag: Clone> Clone for MemPlaceMeta<Tag>

pub fn clone(&self) -> MemPlaceMeta<Tag>

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Tag: Copy> Copy for MemPlaceMeta<Tag>

impl<Tag: Debug> Debug for MemPlaceMeta<Tag>

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Tag: Eq> Eq for MemPlaceMeta<Tag>

impl<Tag: Hash> Hash for MemPlaceMeta<Tag>

pub fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<'__ctx, Tag> HashStable<StableHashingContext<'__ctx>> for MemPlaceMeta<Tag> where
    Tag: HashStable<StableHashingContext<'__ctx>>, 

pub fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<Tag: PartialEq> PartialEq<MemPlaceMeta<Tag>> for MemPlaceMeta<Tag>

pub fn eq(&self, other: &MemPlaceMeta<Tag>) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &MemPlaceMeta<Tag>) -> bool

This method tests for !=.

impl<Tag> StructuralEq for MemPlaceMeta<Tag>

impl<Tag> StructuralPartialEq for MemPlaceMeta<Tag>